[ Log In ]
[ Register ]
NEW: CNC Router PLANS Available for all of our Newest CNC Models!! Click here to "Design Your CNC".

Question #: 2254

Question: BlackFoot CNC: Where should z-axis limit switches be placed?

Current Solution

The limit switch for the z-axis should be placed in a location where nothing can interfere with CNC process, now for our blackFoot, referring to step 115(https://www.buildyourcnc.com/blackFoot48v40.aspx#prettyPhoto/120/) it will be placed 1-1/4"(may be adjusted) down from the top wood piece(vacuum holder). So contact will be made from the location of the anti-backlash nut wood piece and the limit switch stopping it from going to high.

Respond:

Other Possible Solutions to this Question

  • Were are the mounting locattions of the 6 Limit switches on the Blackfoot 4.3

    Here are the recommended locations for limit switches for our CNC machine kits.

    The x-axis limit switches should be located on a single gantry. This makes the wiring of the limit switches close in proximity and more manageable.
    https://www.buildyourcnc.com/images/IMG_6367-800.JPG

    The y-axis limit switches should be located at each end of the gantry. This keeps the switches stationary and impose minimal movement of the wire for better wire management.

    One end of he gantry:
    https://www.buildyourcnc.com/images/IMG_6361-800.JPG

    Other end of the gantry:
    https://www.buildyourcnc.com/images/IMG_6360-800.JPG

    Click the link to respond:
    Were are the mounting locattions of the 6 Limit switches on the Blackfoot 4.3

  • How should I connect the limit switches to my laser controller?

    If you are using the AWC708 or equivalent laser controller, the limit switches will connect between the EL input terminal and the GND terminal in normally open (NO) connection. Most limit switches can be connected as NO, or normally closed (NC).

    For instance, a limit switch for the X- limit will be connected from the ELX- terminal to the NO connection of the limit switch, then a connection from the GND terminal on the laser controller to the COM connection to the same limit switch.

    Click the link to respond:
    How should I connect the limit switches to my laser controller?

  • Where are the limit switch connections made when the switches are in series, and NC??

    One end of the limit switch circuit will be connected to the pin and NC, and the other end will be connected to COM and GND.

    For example: (the "-" is wire.)

    [Breakout board input pin] ---- ([NC on switch] [com on switch]) ---- [NC on switch] [com on switch] ---- [back to GND on the breakout board]

    An explanation of the limit switch connections is located on the brakout board datasheet: https://www.buildyourcnc.com/item/electronicsAndMotors-parallel-breakout-relay (instruction step # 1.

    Click the link to respond:
    Where are the limit switch connections made when the switches are in series, and NC??

  • I am attempting to set up limit switches on the 5 axis parallel breakout board that came with my BlackFoot kit. The output pins are driving the motors perfectly, but I can't figure out the input pins. With one lead in the 5V pin and one lead testing the input pins, my multimeter reads 0V for all of the input pins. Shouldn't those circuits be +5V? Where am I going wrong?

    When wiring the limit switches to our BoB(breakout board), depending in the older model or our revised version (https://www.buildyourcnc.com/item/electronicsAndMotors-parallel-breakout-relay#prettyPhoto/0/), the older version will need the COM (limit switch) connected to 5V and the NO/NC to your input pin, but with our newer version you will use GND(ground instead of 5V) to common and the same for NO/NC but the setup in the mach3/confi/ports&pins/ is still the same.

    Here is a tutorial where you can see how to set up the limit switches correctly (with our older parallel BoB): Part 1:(

    ), Part 2:(
    )

    Click the link to respond:
    I am attempting to set up limit switches on the 5 axis parallel breakout board that came with my BlackFoot kit. The output pins are driving the motors perfectly, but I can't figure out the input pins. With one lead in the 5V pin and one lead testing the input pins, my multimeter reads 0V for all of the input pins. Shouldn't those circuits be +5V? Where am I going wrong?

  • When wiring NC limit switches in series to the V5 BOB where are the connections made on the BOB?

    The breakout board has input pins on one side. Use these pins to connect limit switches. The return of the circuit goes to gnd which is located on the same side, where the input pins are located.

    Click the link to respond:
    When wiring NC limit switches in series to the V5 BOB where are the connections made on the BOB?

  • WHAT CABLE LENGTHS SHOULD USE FOR THE BLACKFOOT CNC MACHINE

    The blackfoot requires a total of 50 feet of cable.

    The X axis needs 15 feet
    The Y axis needs 17 feet
    and the Z-axis needs 18 feet

    These are 20 gauge 4 conductor cable.

    Click the link to respond:
    WHAT CABLE LENGTHS SHOULD USE FOR THE BLACKFOOT CNC MACHINE

  • WHICH MACHINE SHOULD I BUY, THE GREENBULL OR BLACKFOOT?

    The greenBull can range is routing width sizes of 5 feet and 6 feet. The blackFoot has a 4 foot routing width.

    Previous Solution:
    The greenBull machine has a sturdier gantry than the blackFoot, so you can be more agressive with the cutting feedrate (cutting speed). The blackFoot is also a good machine, but it all comes down to the speed at which you want to produce the fabrication

    The spindle is also highly recommended for it's quietness and easier cleanup (no fan blowing the dust in the air)

    Click the link to respond:
    WHICH MACHINE SHOULD I BUY, THE GREENBULL OR BLACKFOOT?

  • SHOULD I SELECT THE GREENBULL OR BLACKFOOT CNC MACHINE?

    The greenBull can range is routing width sizes of 5 feet and 6 feet. The blackFoot has a 4 foot routing width.

    Previous Solution:
    The greenBull machine has a sturdier gantry than the blackFoot, so you can be more agressive with the cutting feedrate (cutting speed). The blackFoot is also a good machine, but it all comes down to the speed at which you want to produce the fabrication

    The spindle is also highly recommended for it's quietness and easier cleanup (no fan blowing the dust in the air)

    Click the link to respond:
    SHOULD I SELECT THE GREENBULL OR BLACKFOOT CNC MACHINE?

  • WHICH MACHINE SHOULD I BUY, THE GREENBULL OR BLACKFOOT?

    The greenBull can range is routing width sizes of 5 feet and 6 feet. The blackFoot has a 4 foot routing width.

    Click the link to respond:
    WHICH MACHINE SHOULD I BUY, THE GREENBULL OR BLACKFOOT?

  • WHICH MACHINE SHOULD I BUY, GREENBULL OR BLACKFOOT?

    The greenBull can range is routing width sizes of 5 feet and 6 feet. The blackFoot has a 4 foot routing width.

    Previous Solution:
    The greenBull machine has a sturdier gantry than the blackFoot, so you can be more agressive with the cutting feedrate (cutting speed). The blackFoot is also a good machine, but it all comes down to the speed at which you want to produce the fabrication

    The spindle is also highly recommended for it's quietness and easier cleanup (no fan blowing the dust in the air)

    Click the link to respond:
    WHICH MACHINE SHOULD I BUY, GREENBULL OR BLACKFOOT?

  • What is the z-axis max drop on the blackfoot?

    The Z-axis max drop with a table is 6", if you have a adjustable midsection or a hollow table, then your maximum is 6" - 3/4".

    Click the link to respond:
    What is the z-axis max drop on the blackfoot?

  • How do I wire the limit switches on the VLXL? Also, where do I place them? You included 2 rotary and two other limit switches.

    You can actually select many places for the switches, depending on where you think your zero will be. I will take pictures of where we positioned our switches. We set the positions so the zero is at the bottom left corner of the machine.

    Additional Information:
    I will take pictures tomorrow.

    Additional Information:
    Thank you. Just want to finish before the holiday.

    Additional Information:
    Not a problem at all and my apologies for not having that information. I have been meaning to put up a video on the limit switch connection as it is somewhat difficult to explain the process in words and diagrams.

    Additional Information:
    Any update?

    Additional Information:
    I plan on driving to the office later today and take pictures.

    Additional Information:
    Thank you. I've just done almost everything else. Just waiting for the grade 3 grease in the mail. Also, where do you suggest connecting the cable carriers? I ran everything through the top but the carrier is getting kind of full. Because of that, it is pushing the belt out when the gantry moves.

    Additional Information:
    I will take pictures of those connections as well.

    Additional Information:
    Much appreciated.

    Additional Information:
    It’s my pleasure.

    Additional Information:
    I’m almost to the office. I’ve been shuttling my kids around today. Sorry for the wait.

    Additional Information:
    I’m adding the images to the end of the VLXL instructions.

    Additional Information:
    The limit switch connections use the NO (Normally Open) terminals. That means that the switch, when not engaged, is normally open (no connection between the com and the NO terminal). When the switch is engaged, then the connection is closed and the NO and COM terminal become connected, making a circuit.

    Additional Information:
    Did you bend the arm on the x switch? Or can you mount it flush with enough give to trigger? Same on both sides?


    Additional Information:
    It does look like it is bent in the picture. No, you do not need to bend the arm of the rotary switch.

    Additional Information:
    We only have the rotary switch on one side.

    Click the link to respond:
    How do I wire the limit switches on the VLXL? Also, where do I place them? You included 2 rotary and two other limit switches.

  • When connecting homing switches, should I use more than one input?

    It is ok to connect the limit/homing switches to the same input.  The machine will go through a procedure that will start with the first axis, hit the switch, pull off, move more slowly for better accuracy, then pull off again.  This procedure makes sure that the input is always in the correct state while homing.

    Click the link to respond:
    When connecting homing switches, should I use more than one input?

  • wiring limit switches in series NC to the V5 Break Out Board

    When wiring limit switches to the breakout board, generally NC (Normally Closed) are connected in series (acts like a wire that when broken, breaks the circuit). NO (Normally Open) is generally wired in parallel where if one is pressed, the wire creates a circuit connecting the pin to gnd.

    Additional Information:


    Additional Information:


    Additional Information:

    Click the link to respond:
    wiring limit switches in series NC to the V5 Break Out Board

  • DO NEED LIMIT SWITCHES, IF SO WHAT IS YOUR RECOMMENDATION?

    Limit switches are not really needed for this level of a machine, but if you do want to use them, then you will need to connect them with shielded cable and ground the shield at both ends and any other non-used wire in the cable. Limit switches are very susceptible to the motor interference. You will also need to adjust the debounce in the software you will use.

    Click the link to respond:
    DO NEED LIMIT SWITCHES, IF SO WHAT IS YOUR RECOMMENDATION?

  • How are limit switches connected to the AWC708 controller?

    If you are using the AWC708 or equivalent laser controller, the limit switches will connect between the EL input terminal and the GND terminal in normally open (NO) connection. Most limit switches can be connected as NO, or normally closed (NC).

    For instance, a limit switch for the X- limit will be connected from the ELX- terminal to the NO connection of the limit switch, then a connection from the GND terminal on the laser controller to the COM connection to the same limit switch.

    Click the link to respond:
    How are limit switches connected to the AWC708 controller?

  • Can you provide recommended locations for limit switches on your kits?

    Here are the recommended locations for limit switches for our CNC machine kits.

    The x-axis limit switches should be located on a single gantry. This makes the wiring of the limit switches close in proximity and more manageable.
    https://www.buildyourcnc.com/images/IMG_6367-800.JPG

    The y-axis limit switches should be located at each end of the gantry. This keeps the switches stationary and impose minimal movement of the wire for better wire management.

    One end of he gantry:
    https://www.buildyourcnc.com/images/IMG_6361-800.JPG

    Other end of the gantry:
    https://www.buildyourcnc.com/images/IMG_6360-800.JPG

    Click the link to respond:
    Can you provide recommended locations for limit switches on your kits?

  • Limit switches connect to AWC708c laser controller

    If you are using the AWC708 or equivalent laser controller, the limit switches will connect between the EL input terminal and the GND terminal in normally open (NO) connection. Most limit switches can be connected as NO, or normally closed (NC).

    For instance, a limit switch for the X- limit will be connected from the ELX- terminal to the NO connection of the limit switch, then a connection from the GND terminal on the laser controller to the COM connection to the same limit switch.

    Click the link to respond:
    Limit switches connect to AWC708c laser controller

  • Are there any videos detailing wiring of limit switches and stop button?

    This video may serve helpful on the homing and limit switches:
    https://www.buildyourcnc.com/PrimeronHomingandLimitSwitches.aspx

    I don't go into great detail on the wiring, however. If after you watch that video and you still need a video, please let me know and I will make a video on the wiring of limit switches and the E-stop button.

    Click the link to respond:
    Are there any videos detailing wiring of limit switches and stop button?

Get Help with:
This Product
Orders
Tech Support
Sales
This Product
Order Query
Tech Support
Sales
Not logged in. Log In Register
Track Order(s)
View Order(s)
I Want to Schecule a One-On-One Paid Tech Support Session
Book an Appointment Pertaining to a BuildYourCNC Product (Free)
Ask a Quesion Below (Free):
Book an Appointment Pertaining Other Equipment ($60/half hour)
Book an Immedite Appointment Pertaining Other Equipment ($120/half hour)
Ask a Quesion Below (Free):
Waiting for response... I may not answer immediately, but I was notified on my cellular phone so my response is forthcoming. If I don't respond immediately, you can always go to the [My Account] page to see all of our chats at any time.